Water-tube boiler.



PATENTED AUG. 8, 1905.

J. KENNEDY. WATER TUBE BOILER.

APPLICATION FILED AUG. 22, 1904.

4 SHEETS-SHEET 1.

INVENTOR WITH ESSES c u m. 1 s m n s w w M w R a o n n w o n p 0 c m m ca w a a u N A PATENTED AUG. 8 1905.

J. KENNEDY.

WATER TUBE BOILER.

APPLICATION FILED AUG. 22, 1904.

4 SHEETS-SHEET 2.

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PATENTED AUG. 8, 1905.

J. KENNEDY. WATER TUBB BOILER.

APPLICATION FILED AUG. 22, 1904.

4 SHEETS-SHEET 3.

I I v I I I I I I I I I I 1 I I I I I INVENTOR MVII-IITN 55555 W No.796,975. PATENTED AUG. 8, 1905.

- J. KENNEDY.

WATER TUBE BOILER.

APPLICATION FILED AUG 22 1904 o a z 21.. 5 1 7 5 o m y 4 MQE g E ll 6 NM2 0 1 MAW i run: 0 4 :L: a 4 I Q? ":(VENTOR 5% WW 4 SHEETS-SHEET 4.

WITNESSES JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed August 22, 19Q4. Serial No. 221,596.

To aZ whom, it may concern:

Be it known that I, JULIAN KENNEDY, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Water-Tube Boiler, of whichthe following is a full, clear, and exact description, reference beingbad to the accompanying drawings, forming part of this specification, inwhich Figure 1 is a sectional side elevation of my improved boiler. Fig.2 is a transverse vertical section of the same. Fig. 3 is a frontelevation, partly broken away. Fig. 4shows a modified construction, andFig. 5 is a horizontal section on the line V V of Fig. 4.

My invention relates to the class of downdraft-boilers where the gasesflow downwardly among water-tubes and then rise to the stack.

The object of the invention is to provide a boiler of this type whichshall be simple, cheap of construction, economical, and easy of access.

In Figs. 1 to 3 of the drawings, 2 and 3 represent parallel longitudinalsteam and water drums, and 4 and 5 represent parallel longitudinalmud-drums, these drums being connected by banks of tubes 6.

Each unit comprising the upper and lower drums connected by the bank oftubes is supported from the upper drum, the ends of which rest on therear wall 6 of the setting or brickwork surrounding and supporting theboiler and the roof 7 of the flue 8, leading from the combustion-chamber9. The upper drums are also supported upon side brackets, (shown at 10.)The upper opening 11, which leads from the combustion-chamber into thespace around the upper part of the tubes is preferably of sufiicientwidth to cover two units, which are inclosed between the side walls 1212. The lower drums are preferably not connected for water circulation,but "may be stayed by the bolts 13 between them. Each bank ofwater-tubes therefore has its own independent water circulation. Themuddrums are preferably arranged in an enlarged chamber 14, whichextends forwardly below the combustion-chamber, the latter beingsubstantially at the ground-level, (indicated at the line a w.) Accessis had to the chamber 14 through the stack 15 through a door 16, whichleads to steps or ladder-rings 17. The attendant may thus have access tothe lower drums for entering the manholes (indicated at 18) or forinspection. The gases enter the stack through the arched port 19. Itwill be noted that the front and rear walls 20 and 6 are close Ipreferably within the setting,so that they form part of theevaporating-surface. These drums are preferably connected by tubes 21 toan upper transverse steam-drum 22, which is external to the setting andfrom which the steam is taken through outlet 23. The steam and waterdrums preferably have their waterspaces connected by the front U-shapedpipe 24. The mud-drums are provided with suitable blow-off pipes 25,which lead to external valves 26. In building a battery of the boilerseach boiler set of two units is preferably cut off from the next boilerby the common side wall between them, while the front wall 27 over thecombustion-chamber is preferably continuous along the front of thebattery.

In the operation of the boiler water is fed in through pipe 28 andcirculates in the bank of tubes, the gases flowing downwardly throughthe bank in an opposite direction to the rising currents of heated waterin the tubes.

The advantages of my invention result from a simple, convenient, andcheap construction.

N o riveted joints are exposed to the flame and gases. The steam-dryingdrum is external. The boiler is su pported by the upper drums and isfree to expand without injury, the lower drums hanging upon tubes. Largestoragespace is supplied for the heated water. The mud-drums areprotected fromhigh temperature. No baffle-walls are required, andcirculation is strong and certain,being upward in the hotter tubes anddownward in the cooler tubes of each bank. No cleaning-doors or thinpartitions are employed, and the brickwork is solid and not providedwith openings which are liable to start cracks in the setting. The tubesare substantially straight and vertical and all parts subject topressure are cylindrical or spherical in form.

In the modification shown in Fig. 4 the upper drums 2 3 and the lowerdrums 4 5 are arranged transversely of the boiler-setting, so that theproducts of combustion instead of passing through the bank of tubes inthe direction of their length pass downwardly and across the bank oftubes.

Variations may be made in the form and arrangement of the parts withoutdeparting from my invention, since I claim- 1. A downdraft-boiler havinga plurality of units, each consisting of a steam and water drumconnected by a bank of tubes to a parallel mud-drum, said units beingarranged side by side within the setting, a combustionchamber having anopening into the banks of tubes across their front upper portions, andan outlet for the gases below the mud-drums; substantially as described.

2. A downdraft-boiler having a plurality of units, each consisting of asteam and water drum connected by a bank of tubes to a parallelmud-drum, said units being arranged side by side within the setting, acombustionchamber having an opening into the banks of tubes across theirfront upper portions, and a rear outlet for the gases below themud-drums on the side opposite to the inlet for gases; substantially asdescribed.

3. A downdraft-boiler having a plurality of units, each consisting of asteam and water drum connected by a bank of tubes to a parallelmud-drum, said units being arranged side by side within a downdraftchamber common to all, a combustion-chamber having an opening into thebanks of tubes across their front upper portions, and a rear outlet forthe gases below the mud-drums on the side opposite to the inlet forgases; substantially as described.

4. A downdraft-boiler having a series of units, each consisting of alongitudinal cylindrical steam and water drum connected by a bank oftubes to a parallel cylindrical muddrum, said units being arranged sideby side within the setting, a combustion-chamber having an opening intothe banks of tubes across their front upper portions, and a rear outletfor the gases below the mud-drums on the side opposite to the inlet forgases; substantially as described.

5. A water-tube boiler consisting of a series of units each composed ofparallel longitudinal cylindrical upper and lower drums con nected by abank of tubes, said units being arranged side by side, and each unitbeing suspended from the upper drum, a combustionchamber having an upperopening leading into the front upper part of the banks of tubes, anenlarged chamber surrounding the lower part of the banks and themud-drums, and an outlet-flue leading from the rear of said lowerchamber to the stack; substantially as described.

6. A water-tube boiler having upper and lower cylindrical drumsconnected by banks of tubes, said drums extending longitudinally of thesetting, a combustion-chamber substantially at the ground-level andhaving an upwardly-extending fine leading into the front upper parts ofthe banks, a lower chamber surrounding the banks and extending under thecombustion-chamber, and an outlet-flue at the rear of the lower chamber;substantially as described.

7 Adowndraft-boiler consisting of a series of units, each unit havingall parts within the setting of cylindrical or spherical form, andconsisting of an upper and a lower longitudinal drum connected by a bankof vertical tubes, the weight of the unit being hung from the upperdrum, a combustion-chamber having an opening into the upper part of thebank of tubes, and an enlarged chamber surrounding the lower drums andhaving a rear outletflue and a door giving access to the flue and lowerchamber; substantially as described.

8. A downdraft-boiler having two cylindrical longitudinal steam andwater drums, each connected by a bank of vertical tubes to a separatecylindrical mud-drum, an external steam-drum connected to the upperdrum, an external water connection between said drums, a furnace havingan opening into the banks of tubes across their upper front portions anda lower offtake-flue for the gases; substantially as described.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY WVitnesses:

GEO. B. BLEMING, JOHN MILLER.

